The gang at Anandtech got to test drive a Penryn-based box and compare it to the current Conroe-based Core 2 Duo. Quite impressive to say the least. Obviously we'll reserve final judgments on Penryn for our official review of the CPU, but these initial results look very promising. We would expect to see clock for clock Penryn vs. Conroe improvements to be in the 5 - 10% range at minimum depending on the application. Factor in higher clock speeds and you can expect our CPU performance charts to shift up by about 20% by the end of this year.